[afiedler]

Two things I've done:

1. Try your best to move more during the day. Standing desks can help, but standing for 6-8 hours is probably just as bad as sitting. Do walking meetings if possible, and take frequent breaks. sSometimes I'll take conference calls with a headset and stretch in my office. Use a Pomodoro app to remind yourself to stretch or change position every 25 minutes or so.

2. Lots of people who sit for most of the day have lumbar lordosis or weak hip flexors (I did). To check if you have this problem, stand to the side in front of a mirror. Does it look like your butt sticks out and your lower spine curves in? (See here: http://stronglifts.com/lordosis-why-it-causes-lower-back-pai...). The other way you can test this is attempt to do a "hollow rock" (https://www.youtube.com/watch?v=Jh4-uLTL4v4). Is that hard/impossible? You probably have lumbar lordosis, weak hip flexors, weak abs or all of the above.

This can be hard to fix, but not impossible. It's doing to take a few months, but it's totally worth it. The way I did it was to just do Crossfit. It's really hard to do this on your own and keep your motivation up and Crossfit solves that problem. Most Crossfit exercises require you to have an "explosive" hip thrust which will strengthen and stretch your core.

If you don't want to do Crossfit, kettle bells seem to be the exercises in Crossfit that stretch and strengthen the hip flexors most for me. Try kettle bell swings, kettle bell sumo deadlifts, and kettle bell cleans.